AP Syllabus focus:
'The European Coal and Steel Community developed into the EEC and eventually the European Union.'
European integration after World War II emerged gradually. It moved from limited cooperation in key industries to a common market and, finally, to a broader union with political as well as economic institutions.
Origins of Step-by-Step Integration
The first major step toward integration was the European Coal and Steel Community. French leaders, especially Robert Schuman and Jean Monnet, argued that lasting peace required practical cooperation between former rivals, especially France and West Germany. Coal and steel were chosen because they were essential to heavy industry and military production. If these sectors were jointly managed, another major European war would become much harder to organize.
European Coal and Steel Community (ECSC): A supranational organization created by the Treaty of Paris in 1951, placing coal and steel production of six states under shared institutions.
The ECSC began with France, West Germany, Italy, Belgium, the Netherlands, and Luxembourg.
Map of the six founding members of the European Coal and Steel Community (ECSC) in the early 1950s. It helps students quickly connect the ECSC’s institutional “start point” to a specific West European geographic core that later anchored the EEC and EU. Source
Its importance went beyond economics. It introduced the principle of supranationalism, meaning that member states accepted a higher authority in certain limited areas. This was a major change from older diplomacy, which had depended mainly on treaties between fully independent states. The ECSC showed that European states could pool sovereignty for common goals without disappearing as nations.
Why the ECSC Was Important
The ECSC mattered because it created both a model and a method for future integration.
It linked former enemies through shared economic management.
It established common institutions, including a High Authority, a Council of Ministers, an Assembly, and a Court of Justice.
It proved that integration could begin in one sector and then expand into others.
It encouraged the idea that economic interdependence could support political stability.
This incremental approach became a defining feature of postwar European integration. Rather than creating a fully united Europe at once, leaders pursued cooperation in stages.
From Sector Cooperation to the Common Market
Success in coal and steel encouraged broader plans. By the mid-1950s, the six ECSC members wanted wider economic integration, not just shared management of one industrial sector. The result was the Treaties of Rome in 1957, which created the European Economic Community and Euratom. Of these, the EEC became the central institution in the long-term development of European unity.
European Economic Community (EEC): An organization founded in 1957 to create a common market by reducing trade barriers and coordinating economic policy among member states.
The EEC represented a major expansion beyond the ECSC. Instead of focusing only on coal and steel, it aimed to integrate much of the economy. Its long-term goal was the free movement of goods, labor, services, and capital among member states, along with a common external tariff against nonmembers. This marked a shift from limited industrial cooperation to broad economic union. The EEC also strengthened the importance of shared institutions and regular policymaking across national borders.
What Changed Under the EEC
The EEC deepened integration in several important ways:
It created a customs union, completed in 1968, which removed internal tariffs among member states.
It encouraged common policies, most notably the Common Agricultural Policy (CAP).
It broadened the authority and practical significance of European institutions.
It made membership more attractive by offering access to a larger integrated market.
During the 1960s, the institutions of the ECSC, EEC, and Euratom were increasingly linked. The Merger Treaty of 1965, effective in 1967, gave them shared executive institutions. As a result, historians often refer to the combined system as the European Communities. This was an important transitional stage: the original coal-and-steel framework had now become a much wider structure for economic cooperation.
From the European Communities to the European Union
By the 1970s and 1980s, European integration continued through treaty revision and institutional reform. New states joined, showing that the Communities had become an influential and attractive framework. At the same time, leaders pushed to remove remaining barriers that still limited full economic integration. The Single European Act of 1986 was especially important because it set the goal of completing a true single market.
The final major stage in this sequence came with the Maastricht Treaty, signed in 1992 and effective in 1993.
European Union (EU): A political and economic union formally established by the Maastricht Treaty, extending integration beyond economics into wider areas of policy.
The EU built on the earlier Communities rather than replacing them from nothing. That continuity is crucial. The ECSC had created shared control in one strategic sector; the EEC had expanded cooperation into a common market; the EU extended integration into new political forms. Maastricht introduced European citizenship, laid foundations for economic and monetary union, and expanded cooperation in foreign policy and justice. The process was therefore cumulative, with each stage resting on institutions and habits of cooperation developed earlier.
Historical Significance
For AP European History, the main pattern is the gradual evolution of integration. The European Union was not a sudden invention. It emerged from decades of treaty-making, institution-building, and expanding cooperation. The path from ECSC to EEC to EU shows how postwar Europeans moved from narrow functional cooperation to a much broader union.
This development also demonstrates an important historical theme: European integration advanced through incremental change, not revolution. The ECSC was limited but innovative. The EEC widened the scale of integration dramatically. The EU gave that process a new name and a broader political dimension. Together, these stages explain how a community centered on coal and steel became the modern European Union.
FAQ
Britain initially preferred looser forms of cooperation and was wary of supranational institutions that could limit parliamentary sovereignty.
It also had global trade links, Commonwealth commitments, and a belief that it could act independently of continental structures. Many British leaders thought the early Communities might fail or remain limited.
Only later, when the EEC proved economically successful, did British policy shift towards membership.
Euratom was created alongside the EEC in 1957 to promote cooperation in civilian nuclear energy.
It mattered in technical and regulatory terms, but it never matched the political importance of the EEC because:
nuclear development remained expensive and nationally sensitive
the EEC touched everyday trade and economic growth more directly
common market policies affected a much wider range of interests
As a result, the EEC became the dominant engine of integration.
The Court helped turn treaty commitments into enforceable law.
Its major influence came through decisions that established:
direct effect, meaning some Community rules could be used by individuals in national courts
supremacy, meaning European law could take precedence over conflicting national law in certain areas
These rulings gave the Communities practical force and made integration more than a diplomatic agreement between governments.
De Gaulle supported cooperation between European states, but he opposed any system that weakened national sovereignty too much.
He preferred a Europe of states rather than a strongly supranational Europe. This led him to resist efforts that would increase the independence of Community institutions.
His approach slowed some aspects of integration and showed that European unity always involved political disagreement, not just economic planning.
The Maastricht Treaty organised the new EU into three broad areas, often called pillars:
the European Communities, covering economic matters
Common Foreign and Security Policy
cooperation in Justice and Home Affairs
This structure mattered because it showed that the EU was wider than the old EEC. It combined strong economic integration with more cautious intergovernmental cooperation in politically sensitive areas.
Later treaties simplified this arrangement, but the pillar system revealed how uneven integration still was in the early EU.
Practice Questions
Identify ONE important way in which the European Economic Community differed from the European Coal and Steel Community. (2 marks)
1 mark for identifying that the EEC covered a broader range of economic activity than the ECSC.
1 mark for explaining that the ECSC focused only on coal and steel, while the EEC aimed at a common market with reduced trade barriers across much of the economy.
Evaluate the extent to which the development from the ECSC to the EU between 1951 and 1993 represented a major transformation in European integration. (6 marks)
1 mark for a clear argument about the extent of transformation.
1 mark for explaining the limited but innovative role of the ECSC as a supranational organization in coal and steel.
1 mark for explaining how the EEC, created by the Treaties of Rome, expanded integration to the wider economy through a common market.
1 mark for explaining how later reforms, such as the Single European Act or the Merger Treaty, deepened or streamlined integration.
1 mark for explaining how the Maastricht Treaty created the EU and extended cooperation beyond economics.
1 mark for analysis showing continuity and change, such as arguing that integration was transformative but developed gradually through cumulative treaty steps rather than a single break.
